CN103395909B - Two-stage coagulation air-flotation separation equipment and method - Google Patents
Two-stage coagulation air-flotation separation equipment and method Download PDFInfo
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- CN103395909B CN103395909B CN201310317643.4A CN201310317643A CN103395909B CN 103395909 B CN103395909 B CN 103395909B CN 201310317643 A CN201310317643 A CN 201310317643A CN 103395909 B CN103395909 B CN 103395909B
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Abstract
The invention discloses two-stage coagulation air-flotation separation equipment. The two-stage coagulation air-flotation separation equipment comprises a sewage pump, a multiphase medium pump, a pH regulator dosing box, a coagulant PAC (Poly Aluminium Chloride) dosing box, a coagulant-aid PAM (Polyacrylamide) dosing box and solid-liquid reaction separation equipment. The two-stage coagulation air-flotation separation equipment is characterized in that the solid-liquid reaction separation equipment is internally provided with a first-stage solid-liquid separation area, a second-stage mixed reaction area and a slag scraper, wherein the second-stage mixed reaction area is arranged at the outer side of the first-stage solid-liquid separation area and is formed by enclosure of flow guiding plates; and the slag scraper is arranged at the upper part in the solid-liquid reaction separation equipment. The invention also provides a method for carrying out separation by applying the separation equipment. According to the method, before sewage passes through the sewage pump, agents are added for mixing with the sewage, and then the mixture is mixed with air-dissolved water, and then enters the solid-liquid reaction equipment for reaction, so that the coagulation treatment of the sewage can be fully realized and colloid and fine particulate pollutants in water can be better separated. The equipment and the method disclosed by the invention have the advantages that the agent using amount is saved, simultaneously the treating effect is improved, and the equipment is high in integration rate and small in occupied area and the like.
Description
Technical field
The present invention relates to field of environment engineering, specifically relate to a kind of two-stage coagulation air-flotation separation equipment and method.
Background technology
Coagulation air-float water purification technology be one efficiently, solid-liquid separation technique fast, start from ore dressing, this technology is quite subject to the concern of Chinese scholars and is developed rapidly in water treatment field, be widely used at present feedwater, especially the purifying treatment of low temperature, low turbid, rich algae water, and municipal effluent and Industrial Wastewater Treatment.Air supporting process, according to the producing method difference of bubble, can be divided into electrolysis-coagulation air supporting, gas distribution air supporting and air-dissolving air-float, and partial reflux formula pressure air-dissolving air-float is wherein technique the most frequently used in water treatment.
Air supporting is the release of reducing pressure suddenly of the air by being dissolved in the water, and forms a large amount of microbubbles, the wadding grain floating after coagulation is removed, to reach water purification object.The quality of effect depends on the adhesion situation of bubble and wadding grain.Existing air-flotation separation equipment is mainly realized solid-liquid separation by absorption and the jacking of bubble and particle, and effect is unstable, and efficiency ratio is poor.
Flotation waste water treatment technological process makes full use of the contact medium effect of microbubble, make microbubble, micro-floccule in suitable reactor, carry out contact flocculation, it is one that the homophase of particulate matter and out-phase contact flocculation process are melted to two, final form be applicable to separating, it is stable that bubble--flco is aggregate altogether, thereby has improved daf efficiency.
Traditional air-float technology is all first coagulating agent and coagulant aids fully to be mixed with pending water, then adopts the mode of following current to make pending water and dissolved air water carry out coagulating, to reach the object of water treatment.This traditional water technology time is long, needs to arrange coagulation dosing unit and coagulating unit simultaneously, and separating effect is poor, and therefore floor space is large, and cost of equipment is also high.
Summary of the invention
According to the technical problem of above-mentioned proposition, and provide a kind of two-stage coagulation air-flotation separation equipment and method.The present invention is by arranging dosing before pump, pressure air-dissolving, one-level coagulation air-float separates, two-stage coagulation dissolved air flotation realizes coagulation air-float sepn process optimization; In row's scum silica frost mode, adopt solenoid control high-low-position water shoot to realize high-order draining automatic sludge discharge mode simultaneously, simple and easy convenient; Whole plant takes up an area little, less investment, efficiency is high.
The technique means that the present invention adopts is as follows:
A kind of two-stage coagulation air-flotation separation equipment, comprises sump pump, multiphase medium pump, pH adjusting agent dosing tank, coagulating agent PAC dosing tank, coagulant aids PAM dosing tank and solid-liquid reaction separating device, it is characterized in that:
In described solid-liquid reaction separating device, be provided with one-level solid-liquid displacement zone, be arranged on surrounding the secondary hybrid reaction district, the slag scraper that is arranged on described solid-liquid reaction separating device internal upper part that form, be arranged on the perforation header of bottom in described solid-liquid reaction separating device and be arranged on the evacuated tube bottom described solid-liquid reaction separating device by flow deflector of described one-level solid-liquid displacement zone outside; Described slag scraper comprises the dreg scraper that is arranged on scum silica frost groove upper end and the slag-drip opening that is arranged on scum silica frost groove lower end; Described perforation header is connected with high-order water shoot and low level water shoot, and described high-order water shoot and described low level water shoot are connected with header tank, and described header tank lower end is communicated with rising pipe;
One end of described sump pump is connected with sewage lagoon by water absorption tube, and the other end of described sump pump is communicated with waste pipe;
One end of described multiphase medium pump is connected with the inlet pipe that is provided with gas meter, one end of described multiphase medium pump is also connected with the bottom of described solid-liquid reaction separating device by dissolved air water water inlet pipe, the other end of described multiphase medium pump is communicated with dissolved air water house steward, and described dissolved air water house steward is communicated with dissolved air water arm I and dissolved air water arm II;
Described pH adjusting agent dosing tank is connected with chemical feed pipe I by pH adjusting agent volume pump, described coagulating agent PAC dosing tank is connected with chemical feed pipe II by coagulating agent volume pump I, and the other end of the other end of described chemical feed pipe I and described chemical feed pipe II is connected with described water absorption tube;
Described dissolved air water arm I is connected with described waste pipe, after line-blending reactor is connected with chemical feed pipe III, is connected with the one-level hybrid reaction outlet at middle part, described solid-liquid reaction separating device one-level solid-liquid displacement zone; The other end of described chemical feed pipe III is connected with the described coagulant aids PAM dosing tank that is provided with coagulant aids volume pump II;
After being connected with chemical feed pipe IV, described dissolved air water arm II is connected with the secondary hybrid reaction outlet of bottom, described solid-liquid reaction separating device secondary hybrid reaction district; The other end of described chemical feed pipe IV is connected with the described coagulating agent PAC dosing tank that is provided with coagulating agent volume pump II;
Described coagulant aids PAM dosing tank is connected with chemical feed pipe V by coagulant aids volume pump I, and the other end of described chemical feed pipe V is connected with the coagulant aids medicine outlet at middle part, described solid-liquid reaction separating device secondary hybrid reaction district.
As preferably, the upper edge of the water outlet of described high-order water shoot and described scum silica frost groove in the same horizontal line.
As preferably, described waste pipe is provided with sewage flowmeter, control valve, tensimeter and sewage sampling valve; Described dissolved air water arm I is provided with dissolved air water under meter I, control valve, tensimeter and dissolved air water sampling valve; Described dissolved air water arm II is provided with dissolved air water under meter II, control valve and tensimeter.
As preferably, the bottom outside of described solid-liquid reaction separating device is also provided with at least 2 bearings.
The invention also discloses a kind of separation method of above-mentioned two-stage coagulation air-flotation separation equipment, it is characterized in that comprising the steps:
1. dosing mixes: coagulating agent, pH adjusting agent are joined and in water absorption tube, formed one-level dosing sewage by coagulating agent volume pump I and pH adjusting agent volume pump control chemical feeding quantity respectively, one-level dosing sewage is through the high speed rotating cutting of the impeller of sump pump, liquid is mixed with sewage, by valve, sewage flowmeter control sewage quantity through line-blending reactor with converge at chemical feeding points B by the coagulant aids of coagulant aids volume pump II control add-on;
2. one-level coagulation air-float separates: the dissolved air water part that multiphase medium pump produces is joined in the waste pipe before line-blending reactor by dissolved air water under meter I control add-on by dissolved air water arm I, one-level dosing sewage carries out one-level coagulation air-float with the one-level solid-liquid displacement zone of dissolved air water in line-blending reactor is mixed into solid-liquid reaction separating device with the coagulant aids adding by chemical feeding points B and separates, scum silica frost floats to equipment top and forms scum layer, and Separation of Water is flowed out by spout by the bottom of one-level solid-liquid displacement zone;
3. two-stage coagulation dissolved air flotation: multiphase medium pump produce a dissolved air water part by dissolved air water arm II by dissolved air water under meter II control add-on with converge at chemical feeding points C the secondary hybrid reaction district entering in solid-liquid reaction separating device by the coagulating agent of coagulating agent volume pump II control add-on, with complete the water outlet that one-level coagulation air-float separates and mix and tangentially flow out, form eddy flow by flow deflector, flow to the middle part in secondary hybrid reaction district and mix and react by the coagulating agent of coagulant aids volume pump I control add-on, scum silica frost floats to equipment top and forms scum layer,
4. scum silica frost is collected and is discharged with water: separate through one-level coagulation air-float the scum silica frost forming with two-stage coagulation dissolved air flotation and collect formation scum layer at equipment top; Separation of Water after purification is collected by the perforation header of bottom in solid-liquid reaction separating device, then discharges by high-order water shoot and low level water shoot; When the low level drain solenoid valve arranging on low level water shoot is opened, scum silica frost is not arranged in a draining, when low level drain solenoid valve is closed, high-order water shoot starts draining, opens slag scraper row scum silica frost simultaneously, completes after deslagging, open low level drain solenoid valve, carry out the draining of low level water shoot; Cyclical operation, realizes scum silica frost thickening.
As preferably, the dissolved air water discharge of dissolved air water arm I with the dissolved air water discharge of dissolved air water arm II than being 3:2.
Compared with prior art, beneficial effect of the present invention is as follows:
1, because the present invention has fully used the ultimate principle of coagulation air-float co-agglomeration, after the intensive ultramicro air bubble discharging with the molten gas of multiphase medium pump after mixing by dosing before sump pump mixes at once in line-blending reactor, mix again the bridge formation that flocs with gas occurs with coagulant aids, winding, net is caught effect, and because the copolymerized body diameter forming is more much larger than traditional air supporting, also increase many with the density difference of water, ascent rate is faster than traditional air supporting, shorten the Reaction Separation time, and scum silica frost is very stable, water ratio reduces greatly, separation efficiency and the stability of airfloat equipment are greatly improved.
2, the present invention adopts two-stage coagulation air supporting hybrid reaction separating technology process, can fully realize the coagulating treatment of sewage, colloid and fine particle pollutent in better Separation of Water, and can save coagulating agent dosage, improve treatment effect.
3, coagulant aids joins in solid-liquid separation conversion unit by two chemical feeding points, add to be a little positioned at after coagulating agent adds sewage to mix with dissolved air water and add wherein, after mixing, improve the adsorption bridging function of tiny wadding grain and micro-bubble, greatly improve the apparent particle diameter of tiny wadding grain and the two complex body of micro-bubble, according to stokes principle, be very beneficial for floating, and improve stability and the upper i of floating wadding slag.
4, the present invention one-level together with two-stage coagulation air supporting hybrid reaction separating technology process ingehious design, realize automatic intermittent row scum silica frost by switch low level drain solenoid valve, can further reduce the water ratio of wadding slag, simple and convenient, reduce occupation area of equipment, reduce investment.
5, the present invention can be used for producing colloid and the suspended substance in sewage and waste water in process for producing life process, completes solid-liquid separation.
The present invention can extensively promote at sewage treatment area for the foregoing reasons.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention.
In figure: 1, water absorption tube 2, sump pump 3, sewage flowmeter 4, waste pipe 5, multiphase medium pump 6, dissolved air water house steward 7, dissolved air water water inlet pipe 8, dissolved air water arm I 9, dissolved air water arm II 10, inlet pipe 11, gas meter 12, dissolved air water under meter I 13, dissolved air water under meter II 14, line-blending reactor 15, pH adjusting agent dosing tank 16, coagulating agent PAC dosing tank 17, coagulant aids PAM dosing tank 18, pH adjusting agent volume pump 19, coagulating agent volume pump I 20, coagulating agent volume pump II 21, coagulant aids volume pump I 22, coagulant aids volume pump II 23, chemical feed pipe I 24, chemical feed pipe II 25, chemical feed pipe IV 26, chemical feed pipe V 27, chemical feed pipe III 28, one-level hybrid reaction outlet 29, secondary hybrid reaction outlet 30, coagulant aids medicine outlet 31, solid-liquid reaction separating device 32, one-level solid-liquid displacement zone 33, secondary hybrid reaction district 34, slag scraper 35, dreg scraper 36, scum silica frost groove 37, slag-drip opening 38, perforation header 39, low level water shoot 40, high-order water shoot 41, header tank 42, rising pipe 43, bearing 44, evacuated tube
Embodiment
As shown in Figure 1, a kind of two-stage coagulation air-flotation separation equipment, comprises sump pump 2, multiphase medium pump 5, pH adjusting agent dosing tank 15, coagulating agent PAC dosing tank 16, coagulant aids PAM dosing tank 17 and solid-liquid reaction separating device 31.In described solid-liquid reaction separating device 31, be provided with one-level solid-liquid displacement zone 32, be arranged on surrounding the secondary hybrid reaction district 33, the slag scraper 34 that is arranged on described solid-liquid reaction separating device 31 internal upper parts that form, be arranged on the perforation header 38 of described solid-liquid reaction separating device 31 interior bottoms and be arranged on the evacuated tube 44 of described solid-liquid reaction separating device 31 bottoms by flow deflector of described one-level solid-liquid displacement zone outside; Described slag scraper 34 comprises the dreg scraper 35 that is arranged on scum silica frost groove 36 upper ends and the slag-drip opening 37 that is arranged on scum silica frost groove 36 lower ends; Described perforation header 38 is connected with high-order water shoot 40 and low level water shoot 39, described high-order water shoot 40 and described low level water shoot 39 are connected with header tank 41, and the upper edge of the water outlet of described high-order water shoot 40 and described scum silica frost groove 36 in the same horizontal line; Described header tank 41 lower ends are communicated with rising pipe 42; The bottom outside of described solid-liquid reaction separating device 31 is also provided with at least 2 bearings 43.
One end of described sump pump 2 is connected with sewage lagoon by water absorption tube 1, and the other end of described sump pump 2 is communicated with waste pipe 4; Described waste pipe 4 is provided with sewage flowmeter 3, control valve, tensimeter and sewage sampling valve;
One end of described multiphase medium pump 5 is connected with the inlet pipe 10 that is provided with gas meter 11, one end of described multiphase medium pump 5 is also connected with the bottom of described solid-liquid reaction separating device 31 by dissolved air water water inlet pipe 7, the other end of described multiphase medium pump 5 is communicated with dissolved air water house steward 6, and described dissolved air water house steward 6 is communicated with dissolved air water arm I 8 and dissolved air water arm II 9; Described dissolved air water arm I 8 is provided with dissolved air water under meter I 12, control valve, tensimeter and dissolved air water sampling valve; Described dissolved air water arm II 9 is provided with dissolved air water under meter II 13, control valve and tensimeter.
Described pH adjusting agent dosing tank 15 is connected with chemical feed pipe I 23 by pH adjusting agent volume pump 18, described coagulating agent PAC dosing tank 16 is connected with chemical feed pipe II 24 by coagulating agent volume pump I 19, and the other end of the other end of described chemical feed pipe I 23 and described chemical feed pipe II 24 is connected with described water absorption tube 1;
Described dissolved air water arm I 8 is connected with described waste pipe 4, after line-blending reactor 14 is connected with chemical feed pipe III 27, is connected with the one-level hybrid reaction outlet 28 at 32 middle parts, described solid-liquid reaction separating device 31 one-level solid-liquid displacement zone; The other end of described chemical feed pipe III 27 is connected with the described coagulant aids PAM dosing tank 17 that is provided with coagulant aids volume pump II 22;
After being connected with chemical feed pipe IV 25, described dissolved air water arm II 9 is connected with the secondary hybrid reaction outlet 29 of 33 bottoms, described solid-liquid reaction separating device 31 secondary hybrid reaction district; The other end of described chemical feed pipe IV 25 is connected with the described coagulating agent PAC dosing tank 16 that is provided with coagulating agent volume pump II 20;
Described coagulant aids PAM dosing tank 17 is connected with chemical feed pipe V 26 by coagulant aids volume pump I 21, and the other end of described chemical feed pipe V 26 is connected with the coagulant aids medicine outlet 30 at 33 middle parts, described solid-liquid reaction separating device 31 secondary hybrid reaction district.
Above-mentioned is separating device each several part annexation of the present invention, can realize two-stage coagulation dissolved air flotation by said structure, and concrete separation method comprises the steps:
1. dosing mixes: coagulating agent PAC, pH adjusting agent are controlled chemical feeding quantity by coagulating agent volume pump I 19 and pH adjusting agent volume pump 18 respectively and joined and in water absorption tube 1, form one-level dosing sewage, one-level dosing sewage is through the high speed rotating cutting of the impeller of sump pump 2, liquid is mixed with sewage, control sewage quantity by valve, sewage flowmeter 3 and converge at chemical feeding points B through line-blending reactor 14 and the coagulant aids of controlling add-on by coagulant aids volume pump II 22;
2. one-level coagulation air-float separates: multiphase medium pump is sucked the clear water of the initial gross separation of solid-liquid reaction separating device 31 bottoms the pump housing and passed through inlet pipe 10 air amounts simultaneously by dissolved air water water inlet pipe 7, air is after multiphase medium pump 5 is cut repeatedly, pressure maintains within the scope of 0.3-0.5Mpa, make to disperse the air dissolving in water to be emitted fast by regulated valve, the dissolved air water of the micro-bubble diameter that guarantee discharges in 20-40 micrometer range.60% the dissolved air water that multiphase medium pump 5 produces is controlled add-on by dissolved air water arm I 8 by dissolved air water under meter I 12 and is joined in the waste pipe 4 before line-blending reactor 14 and adding an A to converge, one-level dosing sewage and dissolved air water are through line-blending reactor 14, in line-blending reactor 14, bump in conjunction with generating a large amount of band gas flcos, then after forming the bubble of greater particle size and the copolymerized body of wadding grain with the coagulant aids hybrid reaction that adds by chemical feeding points B, entering one-level solid-liquid displacement zone 32 in solid-liquid reaction separating device 31 carries out one-level coagulation air-float and separates, scum silica frost floats to equipment top and forms scum layer, Separation of Water is flowed out by spout by the bottom of one-level solid-liquid displacement zone 32,
3. two-stage coagulation dissolved air flotation: 40% the dissolved air water that multiphase medium pump 5 produces is controlled add-on by dissolved air water arm II 9 by dissolved air water under meter II 13 and converged at chemical feeding points C the secondary hybrid reaction district 33 entering in solid-liquid reaction separating device 31 with the coagulating agent of being controlled add-on by coagulating agent volume pump II 20, with complete the water outlet that one-level coagulation air-float separates and mix and tangentially flow out, form eddy flow by flow deflector, flowing to the middle part in secondary hybrid reaction district 33 mixes and reacts with the coagulating agent of controlling add-on by coagulant aids volume pump I 21, form the copolymerized body of larger bubble and wadding grain, the density difference of this complex body density and water compared with conference automatic-ascending to equipment top, form scum layer,
4. scum silica frost is collected and is discharged with water: separate through one-level coagulation air-float the scum silica frost forming with two-stage coagulation dissolved air flotation and collect formation scum layer at equipment top; Separation of Water after purification is collected by the perforation header 38 of solid-liquid reaction separating device 31 interior bottoms, then discharges by high-order water shoot 40 and low level water shoot 39; When the low level drain solenoid valve arranging on low level water shoot 39 is opened, scum silica frost is not arranged in a draining, when low level drain solenoid valve is closed, high-order water shoot 40 starts draining, opens slag scraper 34 simultaneously and arranges scum silica frost, completes after deslagging, open low level drain solenoid valve, carry out 39 drainings of low level water shoot; Cyclical operation, realizes scum silica frost thickening.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. a two-stage coagulation air-flotation separation equipment, comprise sump pump (2), multiphase medium pump (5), pH adjusting agent dosing tank (15), coagulating agent PAC dosing tank (16), coagulant aids PAM dosing tank (17) and solid-liquid reaction separating device (31), it is characterized in that:
In described solid-liquid reaction separating device (31), be provided with one-level solid-liquid displacement zone (32), what be arranged on outside, described one-level solid-liquid displacement zone surrounds by flow deflector the secondary hybrid reaction district (33) forming, be arranged on the slag scraper (34) of described solid-liquid reaction separating device (31) internal upper part, be arranged on the perforation header (38) of the interior bottom of described solid-liquid reaction separating device (31) and be arranged on the evacuated tube (44) of described solid-liquid reaction separating device (31) bottom, described slag scraper (34) comprises the slag-drip opening (37) that is arranged on the dreg scraper (35) of scum silica frost groove (36) upper end and is arranged on scum silica frost groove (36) lower end, described perforation header (38) is connected with high-order water shoot (40) and low level water shoot (39), described high-order water shoot (40) and described low level water shoot (39) are connected with header tank (41), and described header tank (41) lower end is communicated with rising pipe (42),
One end of described sump pump (2) is connected with sewage lagoon by water absorption tube (1), and the other end of described sump pump (2) is communicated with waste pipe (4);
One end of described multiphase medium pump (5) is connected with the inlet pipe (10) that is provided with gas meter (11), one end of described multiphase medium pump (5) is also connected with the bottom of described solid-liquid reaction separating device (31) by dissolved air water water inlet pipe (7), the other end of described multiphase medium pump (5) is communicated with dissolved air water house steward (6), and described dissolved air water house steward (6) is communicated with dissolved air water arm I (8) and dissolved air water arm II (9);
Described pH adjusting agent dosing tank (15) is connected with chemical feed pipe I (23) by pH adjusting agent volume pump (18), described coagulating agent PAC dosing tank (16) is connected with chemical feed pipe II (24) by coagulating agent volume pump I (19), and the other end of the other end of described chemical feed pipe I (23) and described chemical feed pipe II (24) is connected with described water absorption tube (1);
Described dissolved air water arm I (8) is connected with described waste pipe (4), after line-blending reactor (14) is connected with chemical feed pipe III (27), is connected with the one-level hybrid reaction outlet (28) at middle part, described solid-liquid reaction separating device (31) one-level solid-liquid displacement zone (32); The other end of described chemical feed pipe III (27) is connected with the described coagulant aids PAM dosing tank (17) that is provided with coagulant aids volume pump II (22);
After being connected with chemical feed pipe IV (25), described dissolved air water arm II (9) is connected with the secondary hybrid reaction outlet (29) of bottom, described solid-liquid reaction separating device (31) secondary hybrid reaction district (33); The other end of described chemical feed pipe IV (25) is connected with the described coagulating agent PAC dosing tank (16) that is provided with coagulating agent volume pump II (20);
Described coagulant aids PAM dosing tank (17) is connected with chemical feed pipe V (26) by coagulant aids volume pump I (21), and the other end of described chemical feed pipe V (26) is connected with the coagulant aids medicine outlet (30) at middle part, described solid-liquid reaction separating device (31) secondary hybrid reaction district (33).
2. a kind of two-stage coagulation air-flotation separation equipment according to claim 1, is characterized in that: the upper edge of the water outlet of described high-order water shoot (40) and described scum silica frost groove (36) in the same horizontal line.
3. a kind of two-stage coagulation air-flotation separation equipment according to claim 1, is characterized in that: described waste pipe (4) is provided with sewage flowmeter (3), control valve, tensimeter and sewage sampling valve; Described dissolved air water arm I (8) is provided with dissolved air water under meter I (12), control valve, tensimeter and dissolved air water sampling valve; Described dissolved air water arm II (9) is provided with dissolved air water under meter II (13), control valve and tensimeter.
4. a kind of two-stage coagulation air-flotation separation equipment according to claim 1, is characterized in that: the bottom outside of described solid-liquid reaction separating device (31) is also provided with at least 2 bearings (43).
5. a separation method for two-stage coagulation air-flotation separation equipment claimed in claim 1, is characterized in that comprising the steps:
1. dosing mixes: coagulating agent PAC, pH adjusting agent are controlled chemical feeding quantity by coagulating agent volume pump I (19) and pH adjusting agent volume pump (18) respectively and joined formation one-level dosing sewage in water absorption tube (1), one-level dosing sewage is through the high speed rotating cutting of the impeller of sump pump (2), liquid is mixed with sewage, control sewage quantity by valve, sewage flowmeter (3) and converge at chemical feeding points B through line-blending reactor (14) and the coagulant aids of controlling add-on by coagulant aids volume pump II (22);
2. one-level coagulation air-float separates: the dissolved air water part that multiphase medium pump (5) produces is controlled add-on by dissolved air water arm I (8) by dissolved air water under meter I (12) and joined in the front waste pipe (4) of line-blending reactor (14), one-level dosing sewage carries out one-level coagulation air-float and separates in the one-level solid-liquid displacement zone (32) in line-blending reactor (14) and the coagulant aids adding by chemical feeding points B are mixed into solid-liquid reaction separating device (31) with dissolved air water, scum silica frost floats to equipment top and forms scum layer, Separation of Water is flowed out by spout by the bottom of one-level solid-liquid displacement zone (32),
3. two-stage coagulation dissolved air flotation: the dissolved air water part that multiphase medium pump (5) produces is controlled add-on by dissolved air water arm II (9) by dissolved air water under meter II (13) and converged at chemical feeding points C the secondary hybrid reaction district (33) entering in solid-liquid reaction separating device (31) with the coagulating agent of being controlled add-on by coagulating agent volume pump II (20), with complete the water outlet that one-level coagulation air-float separates and mix and tangentially flow out, form eddy flow by flow deflector, flowing to the middle part in secondary hybrid reaction district (33) mixes and reacts with the coagulating agent of being controlled add-on by coagulant aids volume pump I (21), scum silica frost floats to equipment top and forms scum layer,
4. scum silica frost is collected and is discharged with water: separate through one-level coagulation air-float the scum silica frost forming with two-stage coagulation dissolved air flotation and collect formation scum layer at equipment top; Separation of Water after purification is collected by the perforation header (38) of the interior bottom of solid-liquid reaction separating device (31), then discharges by high-order water shoot (40) and low level water shoot (39); When the upper low level drain solenoid valve arranging of low level water shoot (39) is opened, scum silica frost is not arranged in draining, when low level drain solenoid valve is closed, high-order water shoot (40) starts draining, open slag scraper (34) row scum silica frost simultaneously, complete after deslagging, open low level drain solenoid valve, carry out low level water shoot (39) draining; Cyclical operation, realizes scum silica frost thickening.
6. separation method according to claim 5, is characterized in that: the dissolved air water discharge of the dissolved air water discharge of dissolved air water arm I (8) and dissolved air water arm II (9) is than being 3:2.
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| CN105585091B (en) * | 2016-03-07 | 2018-08-31 | 中国矿业大学 | A kind of flocculating setting method and device |
| CN106044915A (en) * | 2016-07-14 | 2016-10-26 | 宁波威博环保科技有限公司 | Production wastewater treatment system |
| CN106186140A (en) * | 2016-08-01 | 2016-12-07 | 桐乡市致远环保科技有限公司 | High-efficient vertical streaming air-flotation system and operation method thereof |
| CN110002676A (en) * | 2018-04-18 | 2019-07-12 | 中国环境科学研究院 | A kind of sewage plant utilized based on sub-prime and steam power plant's water circulation use technique |
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| US7033495B2 (en) * | 2003-02-27 | 2006-04-25 | Sionix Corporation | Self contained dissolved air flotation system |
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